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Post by nick18sf on Jun 1, 2020 20:49:09 GMT -5
What’s your guy opinion on using priority main oiling for a Chevy 350? Good, bad, not worth it?
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Post by cheezwhiz31 on Jun 2, 2020 13:42:51 GMT -5
Cam Bearings are where i put my attention....I'm no engine builder. But have put together a few in my days and have owned a couple of builders engines. Only issues i've had are very hot with no water and a longer duration of time i melt the cam bearing out of them... Crank and rods usually seem pretty good when i have checked on them. I'd say good oil and filter. Maybe a heavier springed oil pump for more flow and make sure and have enough oil in them. Remember when running alot of RPM there isn't much oil in the pan at that point in time...
so to answer your question i'd try these before changing the design of it....
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Post by amkear613 on Jun 2, 2020 14:51:11 GMT -5
Cam Bearings are where i put my attention....I'm no engine builder. But have put together a few in my days and have owned a couple of builders engines. Only issues i've had are very hot with no water and a longer duration of time i melt the cam bearing out of them... Crank and rods usually seem pretty good when i have checked on them. I'd say good oil and filter. Maybe a heavier springed oil pump for more flow and make sure and have enough oil in them. Remember when running alot of RPM there isn't much oil in the pan at that point in time... so to answer your question i'd try these before changing the design of it.... Curious to your thoughts on types of bearings for cam. I’m starting a county fair build and have read all tips and such and I am currently unable to buy an engine built by a reputable builder. I’ve seen some racers suggest aluminum bearings instead of the multiple layered ones. Just picking brains as I’d like to have some great bearings followed by forgiving clearances and decent ring gaps. Don’t mind learning myself either if I have to though but a nudge in the right direction is always appreciated. |
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noser23x
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Post by noser23x on Jun 2, 2020 23:04:42 GMT -5
Cam Bearings are where i put my attention....I'm no engine builder. But have put together a few in my days and have owned a couple of builders engines. Only issues i've had are very hot with no water and a longer duration of time i melt the cam bearing out of them... Crank and rods usually seem pretty good when i have checked on them. I'd say good oil and filter. Maybe a heavier springed oil pump for more flow and make sure and have enough oil in them. Remember when running alot of RPM there isn't much oil in the pan at that point in time... so to answer your question i'd try these before changing the design of it.... Curious to your thoughts on types of bearings for cam. I’m starting a county fair build and have read all tips and such and I am currently unable to buy an engine built by a reputable builder. I’ve seen some racers suggest aluminum bearings instead of the multiple layered ones. Just picking brains as I’d like to have some great bearings followed by forgiving clearances and decent ring gaps. Don’t mind learning myself either if I have to though but a nudge in the right direction is always appreciated. Roller or bronze. |
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Post by amkear613 on Jun 3, 2020 6:38:26 GMT -5
Curious to your thoughts on types of bearings for cam. I’m starting a county fair build and have read all tips and such and I am currently unable to buy an engine built by a reputable builder. I’ve seen some racers suggest aluminum bearings instead of the multiple layered ones. Just picking brains as I’d like to have some great bearings followed by forgiving clearances and decent ring gaps. Don’t mind learning myself either if I have to though but a nudge in the right direction is always appreciated. Roller or bronze. thabks, been researching solid metal vs tri metal etc. |
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Post by nick18sf on Jun 4, 2020 7:50:54 GMT -5
Thanks for the responses. I might re think the oiling system and just keep it more in the stock form. The motor I’m building will be used in 1 shot deals w bone stock 80’s cars.
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Post by amkear613 on Jun 4, 2020 9:01:45 GMT -5
Thanks for the responses. I might re think the oiling system and just keep it more in the stock form. The motor I’m building will be used in 1 shot deals w bone stock 80’s cars. Have you read in the tips about grinding down some of the ridges at the top of the block in the valley above timing chain etc? Sbc build tips page 3. Jokers original sbc build post goes into great detail how to do stock engine builds. |
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Post by cheezwhiz31 on Jun 4, 2020 10:38:22 GMT -5
Thanks for the responses. I might re think the oiling system and just keep it more in the stock form. The motor I’m building will be used in 1 shot deals w bone stock 80’s cars. Check the oil return holes on the Heads most the time they are casted over some. Screwdriver or chisel will knock out that stuff and allow more oil to flow back down. |
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Post by nick18sf on Jun 4, 2020 14:48:16 GMT -5
Thanks for the responses. I might re think the oiling system and just keep it more in the stock form. The motor I’m building will be used in 1 shot deals w bone stock 80’s cars. Have you read in the tips about grinding down some of the ridges at the top of the block in the valley above timing chain etc? Sbc build tips page 3. Jokers original sbc build post goes into great detail how to do stock engine builds. Yea I’ve seen jokers post. It’s really helpful. I’ve read all 100 pages on the sbc thread. I’ll get all ridges & rough castings edges burred off. Thsnks |
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Post by nick18sf on Jun 4, 2020 14:59:28 GMT -5
Thanks for the responses. I might re think the oiling system and just keep it more in the stock form. The motor I’m building will be used in 1 shot deals w bone stock 80’s cars. Check the oil return holes on the Heads most the time they are casted over some. Screwdriver or chisel will knock out that stuff and allow more oil to flow back down. I’ll be checking the oil return holes and cleaning up all passages. The more I read about priority oiling the more I might stay away from it. Thanks |
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Post by derbydude on Dec 3, 2020 16:25:31 GMT -5
Curious to your thoughts on types of bearings for cam. I’m starting a county fair build and have read all tips and such and I am currently unable to buy an engine built by a reputable builder. I’ve seen some racers suggest aluminum bearings instead of the multiple layered ones. Just picking brains as I’d like to have some great bearings followed by forgiving clearances and decent ring gaps. Don’t mind learning myself either if I have to though but a nudge in the right direction is always appreciated. Roller or bronze. Where do you find bronze cam bearings? Also with the roller cam bearings I know the block has to be machined to accept them, but does the cam require a different bearing journal diameter as well? |
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Post by amkear613 on Dec 4, 2020 10:02:01 GMT -5
Where do you find bronze cam bearings? Also with the roller cam bearings I know the block has to be machined to accept them, but does the cam require a different bearing journal diameter as well? I had yet to find bronze bearings. Originally pointed in direction of Baldwin but they stopped doing it and only offer roller. With my budget I ended up going with king hp mains with the elongated oil holes and coated cam bearings. I’ve also toned down my original build plans and went more conservative. If you find any message me. I’m more curious than anything at this point. |
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demoboy333
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Post by demoboy333 on Dec 4, 2020 12:54:09 GMT -5
Roughly what's it cost for Baldwin to machine and install their roller bearings?
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Post by amkear613 on Dec 4, 2020 13:51:25 GMT -5
Roughly what's it cost for Baldwin to machine and install their roller bearings? Idk I wasn’t interested in them. My local machine shop said they could do it as well. I asked out of curiosity. I know the machine work for it was going to be around $200 but can’t remember exactly. I didn’t ask how much the bearings themselves were. |
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